Description: Large & clear display for easy reading with 0-25mm range. Smart design: automatic switch off; zero setting at any place; inch/mm conversion. Accurate Measurement: Range: 0-25mm (1"); Resolution: 0.001mm.?0.00003"? Accuracy 0.003mm(0.0009"). Suitable for measuring the external/ outside diameter, useful for basic measurements. Great little tool for the hobbyist and DIY work. Specification: Material: Carbon steel Color: As Pictures Shown Minimum accuracy scale: 0.001mm/0.00003" Accuracy: 0.003mm/0.00009" Battery: 1 * 3V CR2032 Button Battery (Not Included for shipment) Measuring range: 0-25mm Size: Approx. 155x 63mm/ 6.10x 2.48inch Package Includes: 1 Piece Digital External/Outside Micrometer